Note that for 40% of the time you were using 14mm or wider. My suggestion for the 12mm was on the basis of NOT having anything wider. Now if I can have the 7-14 in my bag, then I might well consider the 17 (or 17.5) as the next lens. My target collection is currently: 7.5mm fisheye, 17mm, 14-42 kit lens and 45mm f/1.8. I have the latter two, plus the 11-22 from my 4/3 kit.